C11111333133313232233133313331333133112111112113313331321123232231211   >>    C1111133313331323223313331333133313311211111211331333132112323223121   <<    C11111333133313232233133313331333133112111112113313331321123232231213   >>      C11111333133313232233133313331333133112111112113313331321123232231212   >>